CN109950636A - A kind of nickelic ternary lithium ion battery chemical synthesis technology - Google Patents
A kind of nickelic ternary lithium ion battery chemical synthesis technology Download PDFInfo
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- CN109950636A CN109950636A CN201910218305.2A CN201910218305A CN109950636A CN 109950636 A CN109950636 A CN 109950636A CN 201910218305 A CN201910218305 A CN 201910218305A CN 109950636 A CN109950636 A CN 109950636A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of nickelic ternary lithium ion battery chemical synthesis technologies, in turn include the following steps: (1) carrying out vacuum liquid filling to the battery core after baking；(2) pre- envelope；(3) quiescence in high temperature；(4) room temperature chemical conversions；(5) vacuum suction；(6) secondary room temperature chemical conversion；(7) high temperature ageing；(8) it cools；(9) it seals eventually.The present invention can effectively improve the compactness and stability of the solid electrolyte membrane of positive and negative electrode surface formation, to improve the safety of lithium ion battery, stability, the again chemical properties such as forthright, cycle life.
Description
Technical field
The present invention relates to lithium ion battery technologies, and in particular to a kind of nickelic ternary lithium ion battery chemical synthesis technology.
Background technique
Requirement of the market to electric car course continuation mileage is constantly promoted, from original 100 kilometers, to 200 kilometers ..., directly
To four or five hundred kilometers or more for need to mutually haggling with fuel vehicle.It sums up in the point that on power battery, i.e., the energy for constantly promoting battery is close
Degree, each Battery Plant are realized by promoting positive and negative electrode material gram volume.For positive electrode, from original LiFePO4,
Ternary 111 is increasingly prone to nickelic ternary material.
Chemical conversion is the important procedure in lithium ion battery production technology, forms solid electrolyte in negative terminal surface when chemical conversion
(Solid Electrolyte Interface, abbreviation SEI) film, the quality of SEI film directly affect safety, the stabilization of battery
Property, the again chemical properties such as forthright, cycle life.For nickelic ternary lithium ion battery, additional anode is added in electrolyte
Film for additive also forms solid electrolyte (Cathode Electrolyte Interphase, letter in positive electrode surface when chemical conversion
Claim CEI) film, likewise, the quality of CEI film, also directly affects safety, stability, the again electricity such as forthright, cycle life of battery
Chemical property.
The chemical synthesis technology of traditional lithium-ion battery is generally that fluid injection, pre- envelope, room temperature is stood, chemical conversion, envelope, room temperature are old eventually for pumping
Change.For nickelic ternary lithium ion battery, positive and negative anodes pole piece painting work amount is bigger than normal, and battery core infiltration is difficult, while using new electrolysis
Liquid system causes lithium ion battery to discharge more amount gas in formation process, and soft bag lithium ionic cell hardness is lower, lithium from
It is excluded not in time after sub- battery producing gas, not can guarantee effective contact between anode, diaphragm and cathode, influence SEI film and CEI
The compactness of film.
Summary of the invention
The present invention to solve the above-mentioned problems, to provide a kind of nickelic ternary lithium ion battery chemical synthesis technology.
In order to achieve the above objectives, technical scheme is as follows:
A kind of nickelic ternary lithium ion battery chemical synthesis technology, the chemical synthesis technology in turn include the following steps:
(1) vacuum liquid filling is carried out to the battery core after baking；
(2) pre- envelope；
(3) quiescence in high temperature；
(4) room temperature chemical conversions；
(5) vacuum suction；
(6) secondary room temperature chemical conversion；
(7) high temperature ageing；
(8) it cools；
(9) it seals eventually.
In a preferred embodiment of the invention, the dwell temperature in step (3) is 35 DEG C~55 DEG C, and time of repose is
8h~for 24 hours.
In a preferred embodiment of the invention, in step (4) use low current charge, size of current be 0.02C~
0.1C, charging time are 1h~5h.
In a preferred embodiment of the invention, in step (6) use large current charge, size of current be 0.1C~
1.0C, charge cutoff voltage are 3.59V~3.9V.
In a preferred embodiment of the invention, normal pressure is used in step (7), aging temperature is 35 DEG C~55 DEG C, always
The change time is 12h~72h.
In a preferred embodiment of the invention, battery is melted into using clamping plate room temperature in step (4) and step (6), folder
Plate pressure is 500kgf~71000kgf.
In a preferred embodiment of the invention, the vacuum degree of step (2), step (5) and step (9) be less than or equal to-
90KPa。
The beneficial effects of the present invention are:
The present invention can effectively improve the compactness and stability of the solid electrolyte membrane of positive and negative electrode surface formation, thus
Improve safety, stability, the again chemical properties such as forthright, cycle life of lithium ion battery.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is process flow chart of the invention.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Fig. 1, nickelic ternary lithium ion battery chemical synthesis technology provided by the invention in turn includes the following steps:
(1) vacuum liquid filling is carried out to the battery core after baking；
(2) pre- envelope；
(3) quiescence in high temperature；
(4) room temperature chemical conversions；
(5) vacuum suction；
(6) secondary room temperature chemical conversion；
(7) high temperature ageing；
(9) it cools；
(10) it seals eventually.
After carrying out vacuum liquid filling to the battery core after baking in step (1), need to be placed in again under vacuum state 30~60 seconds,
Air in pole piece hole can effectively be discharged in this way, be conducive to electrolyte infiltration pole piece.
Pre- envelope in step (2) is to be sealed for the first time to the soft pack cell of vacuum liquid filling.
In step (3), by carrying out quiescence in high temperature to battery core, pole piece electrolyte can be accelerated to infiltrate, so that battery is being changed
At preceding well being infiltrated, non-wetting is avoided to cause blackspot (being melted into bad area).
In addition, step (3) is specific under normal pressure, dwell temperature is 35 DEG C~55 DEG C, and time of repose is 8h~for 24 hours, in this way
Abundant effect of impregnation can be achieved.
Specifically charged using low current in step (4), size of current is 0.02C~0.1C, the charging time be 1h~
5h, so that electrolyte is decomposed on positive and negative electrode surface and formed a film, the big volume production gas of battery core.
Step (5) is to remove a room temperature for being evacuated to battery core and be melted into the gas to be formed, improve chemical conversion effect
Fruit.
It is specifically charged using high current in step (6), size of current is 0.1C~1.0C, and charge cutoff voltage is
3.59V~3.9V may make positive and negative electrode surface further to form a film in this way.
In addition, battery uses clamping plate in the room temperature chemical conversion of step (4) and the secondary room temperature formation process of step (6)
Room temperature chemical conversion, clamping plate pressure are 500kgf~71000kgf, are conducive to reaction in this way and produce gas, are conducive to film formation reaction.
Step (7) is for making solid electrolyte membrane from shaping, and film forming stabilizes.
In addition, using normal pressure in step (7), aging temperature is 35 DEG C~55 DEG C, and ageing time is 12h~72h.
Step (8) be for cooling down, being quickly down to room temperature to the battery core after high temperature ageing will be completed, thus
Convenient for Quick seal, improve efficiency.
In addition, the vacuum degree of step (2), step (5) and step (9) is both less than equal to -90KPa in the present invention.
In this way, by above-mentioned technique it is found that quiescence in high temperature is carried out to battery core before chemical conversion, in the premise for shortening time of repose
Lower improvement battery core infiltration.Timely vacuum suction is carried out to battery core after the chemical conversion of room temperature, removes big volume production gas in battery core, after again into
The secondary room temperature chemical conversion of row, is conducive to effective contact between anode, diaphragm and cathode, advantageously forms fine and close solid electrolyte
Film.High temperature ageing process after chemical conversion is conducive to self shaping of solid electrolyte membrane, keeps solid electrolyte membrane further fine and close
Change and stabilizes.Finally, the chemical property of battery core, especially cycle life are significantly improved.
In addition above-mentioned processing step is all those skilled in the art by testing and making the creative labor many times acquisition,
Above-mentioned steps are only successively used, the solid-state electricity that the positive and negative electrode surface of nickelic ternary lithium ion battery is formed can be just effectively improved
The compactness and stability for solving plasma membrane, to improve the safety of lithium ion battery, stability, again forthright, cycle life etc.
Chemical property.
For above scheme, the application is further detailed by application example in detail below and Experimental Comparison.
Embodiment 1
This example is by successively carrying out following chemical synthesis technology to nickelic ternary/graphite battery core after baking:
Vacuum liquid filling；
Pre- envelope；
Quiescence in high temperature；
Room temperature chemical conversion；
Vacuum suction；
Secondary room temperature chemical conversion；
High temperature ageing；
It cools；
Envelope eventually.
In the present embodiment, under normal pressure, in quiescence in high temperature process, dwell temperature is 35 DEG C, time of repose 12h.
In a room temperature formation process, charging current 0.1C, charging time 1h；
In secondary room temperature formation process, charging current 0.2C, charge cutoff voltage 3.85V.
In stating primary and secondary room temperature formation process, battery is melted into using clamping plate room temperature, and clamping plate pressure is 500kgf.
In high temperature ageing process, under normal pressure, aging temperature is 35 DEG C, ageing time 72h.
In pre- envelope, vacuum suction and envelope process eventually, setting vacuum degree is -90KPa.
Comparative example 1
This example is by successively carrying out following chemical synthesis technology to nickelic ternary/graphite battery core after baking:
Vacuum liquid filling；
Pre- envelope；
Quiescence in high temperature；
Room temperature chemical conversion；
Secondary room temperature chemical conversion；
Vacuum suction；
High temperature ageing；
It cools；
Envelope eventually.
In the present embodiment, secondary room temperature chemical conversion is directly carried out after the chemical conversion of room temperature, followed by being evacuated.
In quiescence in high temperature process, under normal pressure, dwell temperature is 35 DEG C, time of repose 12h.
In a room temperature formation process, charging current 0.1C, charging time 1h；
In secondary room temperature formation process, charging current 0.2C, charge cutoff voltage 3.85V.
In stating primary and secondary room temperature formation process, battery is melted into using clamping plate room temperature, and clamping plate pressure is 500kgf.
In high temperature ageing process, under normal pressure, aging temperature is 35 DEG C, ageing time 72h.
In pre- envelope, vacuum suction and envelope process eventually, setting vacuum degree is -90KPa.
Comparative example 2
This example is by successively carrying out following chemical synthesis technology to nickelic ternary/graphite battery core after baking:
Vacuum liquid filling；
Pre- envelope；
Room temperature is stood；
Room temperature chemical conversion；
Vacuum suction；
Secondary room temperature chemical conversion；
High temperature ageing；
It cools；
Envelope eventually.
In the present embodiment, quiescence in high temperature process is not used, and two use room temperature resting process.
In room temperature resting process, under normal temperature and pressure, time of repose is for 24 hours.
In a room temperature formation process, charging current 0.1C, charging time 1h；
In secondary room temperature formation process, charging current 0.2C, charge cutoff voltage 3.85V.
In stating primary and secondary room temperature formation process, battery is melted into using clamping plate room temperature, and clamping plate pressure is 500kgf.
In high temperature ageing process, under normal pressure, aging temperature is 35 DEG C, ageing time 72h.
In pre- envelope, vacuum suction and envelope process eventually, setting vacuum degree is -90KPa.
By according to the battery respectively obtained after the chemical conversion of embodiment 1, comparative example 1 and 2 chemical synthesis technology of comparative example, carry out respectively normal
Warm loop test, as a result as follows:
| Capacity retention ratio | Embodiment 1 | Comparative example 1 | Comparative example 2 |
| 1 week | 100.0% | 100.0% | 100.0% |
| 201 weeks | 99.9% | 97.3% | 98.3% |
| 401 weeks | 98.6% | 94.8% | 96.6% |
| 601 weeks | 96.2% | 92.7% | 95.5% |
As can be seen from the above table, chemical synthesis technology of the invention can effectively improve nickelic ternary/graphite battery core room temperature and follow
Ring performance.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (7)
1. a kind of nickelic ternary lithium ion battery chemical synthesis technology, which is characterized in that the chemical synthesis technology in turn includes the following steps:
(1) vacuum liquid filling is carried out to the battery core after baking；
(2) pre- envelope；
(3) quiescence in high temperature；
(4) room temperature chemical conversions；
(5) vacuum suction；
(6) secondary room temperature chemical conversion；
(7) high temperature ageing；
(8) it cools；
(9) it seals eventually.
2. a kind of nickelic ternary lithium ion battery chemical synthesis technology according to claim 1, which is characterized in that in step (3)
Dwell temperature be 35 DEG C~55 DEG C, time of repose is 8h~for 24 hours.
3. a kind of nickelic ternary lithium ion battery chemical synthesis technology according to claim 1, which is characterized in that in step (4)
Using low current charge, size of current is 0.02C~0.1C, and the charging time is 1h~5h.
4. a kind of nickelic ternary lithium ion battery chemical synthesis technology according to claim 1, which is characterized in that in step (6)
Using large current charge, size of current is 0.1C~1.0C, and charge cutoff voltage is 3.59V~3.9V.
5. a kind of nickelic ternary lithium ion battery chemical synthesis technology according to claim 1, which is characterized in that in step (7)
Using normal pressure, aging temperature is 35 DEG C~55 DEG C, and ageing time is 12h~72h.
6. a kind of nickelic ternary lithium ion battery chemical synthesis technology according to claim 1, which is characterized in that step (4) and
Battery is melted into using clamping plate room temperature in step (6), and clamping plate pressure is 500kgf~71000kgf.
7. a kind of nickelic ternary lithium ion battery chemical synthesis technology according to claim 1, which is characterized in that step (2), step
Suddenly the vacuum degree of (5) and step (9) is less than or equal to -90KPa.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459817A (en) * | 2019-07-24 | 2019-11-15 | 中国科学院山西煤炭化学研究所 | A kind of nickelic quick chemical synthesis technology of ternary power battery of Soft Roll |
| CN111313115A (en) * | 2020-02-27 | 2020-06-19 | 四川国创成电池材料有限公司 | Lithium ion battery formation method and lithium ion battery |
| CN113097667A (en) * | 2021-04-09 | 2021-07-09 | 芜湖天弋能源科技有限公司 | Method for improving formation interface of lithium ion battery |
| CN113363419A (en) * | 2021-06-23 | 2021-09-07 | 天津市捷威动力工业有限公司 | Negative pole piece and preparation method and application thereof |
| CN113451656A (en) * | 2020-03-24 | 2021-09-28 | 深圳格林德能源集团有限公司 | Infiltration formation process of high-nickel lithium ion battery |
| CN113540595A (en) * | 2021-06-18 | 2021-10-22 | 万向一二三股份公司 | Formation method for improving high-nickel ternary material battery cell interface |
| CN115332637A (en) * | 2022-09-06 | 2022-11-11 | 香河昆仑新能源材料股份有限公司 | High lithium salt concentration electrolyte and use method thereof in lithium ion battery |
| CN115425309A (en) * | 2022-09-28 | 2022-12-02 | 楚能新能源股份有限公司 | High-efficiency forming method for soft package battery |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459817A (en) * | 2019-07-24 | 2019-11-15 | 中国科学院山西煤炭化学研究所 | A kind of nickelic quick chemical synthesis technology of ternary power battery of Soft Roll |
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| CN111313115A (en) * | 2020-02-27 | 2020-06-19 | 四川国创成电池材料有限公司 | Lithium ion battery formation method and lithium ion battery |
| CN113451656A (en) * | 2020-03-24 | 2021-09-28 | 深圳格林德能源集团有限公司 | Infiltration formation process of high-nickel lithium ion battery |
| CN113451656B (en) * | 2020-03-24 | 2023-02-03 | 深圳格林德能源集团有限公司 | Infiltration formation process of high-nickel lithium ion battery |
| CN113097667A (en) * | 2021-04-09 | 2021-07-09 | 芜湖天弋能源科技有限公司 | Method for improving formation interface of lithium ion battery |
| CN113540595A (en) * | 2021-06-18 | 2021-10-22 | 万向一二三股份公司 | Formation method for improving high-nickel ternary material battery cell interface |
| CN113363419A (en) * | 2021-06-23 | 2021-09-07 | 天津市捷威动力工业有限公司 | Negative pole piece and preparation method and application thereof |
| CN115332637A (en) * | 2022-09-06 | 2022-11-11 | 香河昆仑新能源材料股份有限公司 | High lithium salt concentration electrolyte and use method thereof in lithium ion battery |
| CN115332637B (en) * | 2022-09-06 | 2024-03-26 | 香河昆仑新能源材料股份有限公司 | High-lithium-salt-concentration electrolyte and application method thereof in lithium ion battery |
| CN115425309A (en) * | 2022-09-28 | 2022-12-02 | 楚能新能源股份有限公司 | High-efficiency forming method for soft package battery |
| CN115425309B (en) * | 2022-09-28 | 2023-05-12 | 楚能新能源股份有限公司 | Efficient formation method of soft package battery |
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Application publication date: 20190628 |